| 三电平NPC逆变器中点电压平衡混合调制策略 |
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| 引用本文： | 李玥,黄孙伟,徐川. 三电平NPC逆变器中点电压平衡混合调制策略[J]. 计算机应用与软件, 2021, 38(2): 85-92. DOI: 10.3969/j.issn.1000-386x.2021.02.015 |
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| 作者姓名： | 李玥 黄孙伟 徐川 |
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| 作者单位： | 天津理工大学电气电子工程学院 天津 300384;天津理工大学天津市复杂控制理论与应用重点实验室 天津 300384 |
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| 摘 要： | 针对二极管中点钳位型(neutral point clamped,NPC)三电平逆变器直流侧电容电压不平衡问题,提出一种混合空间矢量脉宽调制技术(Space vector pulse width modulation,SVPWM)和虚拟空间矢量脉宽调制技术(Virtual space vector pulse widt...
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| 关 键 词： | 电容电压不平衡 调制比 简化空间矢量脉宽调制技术 PI 控制器 改进虚拟空间矢量脉宽调制技术 滞环比较器 |
THREE-LEVEL NPC INVERTER MIDPOINT VOLTAG BALANCE HYBRID MODULATION STRATEGY |
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| Li Yue,Huang Sunwei,Xu Chuan. THREE-LEVEL NPC INVERTER MIDPOINT VOLTAG BALANCE HYBRID MODULATION STRATEGY[J]. Computer Applications and Software, 2021, 38(2): 85-92. DOI: 10.3969/j.issn.1000-386x.2021.02.015 |
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| Authors: | Li Yue Huang Sunwei Xu Chuan |
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| Affiliation: | (School of Electrical Engineering,Tianjin University of Technology,Tianjin 300384,China;Tianjin Key Laboratory for Control Theory and Application in Complicated,Tianjin University of Technology,Tianjin 300384,China) |
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| Abstract: | In order to solve the problem of DC-capacitor voltage imbalance of diode neutral point clamped(NPC)three-level inverter,a control strategy of hybrid space vector pulse width modulation(SVPWM)and virtual space vector pulse width modulation(VSVPWM)is proposed.In 60°coordinate system,large sector rotation model and small sector re-division were used to simplify the calculation.When the modulation ratio was low,a series of processing was used to simplify the SVPWM algorithm,and a PI controller was designed to adjust the small vector action time and balance the neutral point voltage.When the modulation ratio was high,the VSVPWM was improved to redefine the small and medium vectors,and the hysteresis comparator was designed to balance the neutral point voltage while reducing the common mode voltage.The simulation and experimental results show that the proposed method is correct and effective. |
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| Keywords: | Capacitor voltage imbalance Modulation ratio Simplify SVPWM PI controller Improve VSVPWM Hysteresis comparator |
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